Mask ventilation assist device



FIG. 1 is a perspective view of a mask ventilation assist device showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 5 is an end view thereof, the opposite end being a mirror image thereof; and,

FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 2. 

CLAIM The ornamental design for a mask ventilation assist device, as shown and described. 